Back portion of a mobile communication device



FIG. 1 is a back view of an embodiment of a back portion of a mobile communication device showing our design.

FIG. 2 is a front perspective view of the mobile communication device with a screen portion in an open position.

FIG. 3 is a back view thereof, with a bottom portion of the mobile communication device removed for purposes of illustration.

FIG. 4 is a back view of a variation of the back portion of a mobile communication device in which the two generally circular regions have a contrasting material or finish; and,

FIG. 5 is a back view of another variation of the back portion of a mobile communication device.

The broken line(s), which define the bounds of the back portion of a mobile communication device and the arrangement of certain features of the device, form no part of the claimed design. 

The ornamental design for a back portion of a mobile communication device, as shown and described. 